Study on the Structural and Photocatalytic Properties for Pore Size Tailored SnO₂-Pillared Layered Titanate Nanohybrids

Abstract

A new mesoporous SnO2-pillared layered titanate is prepared by hybridizing the exfoliated titanate nanosheets with SnO2 nanosol particles. The pore size tailored porous nanohybrids (SBET = 74 approximately 280 m2/g and d = 18 approximately 96 angstroms) are obtained after calcining an as-prepared sample. The mesoporous nanohybrids exhibited different photocatalytic behaviors for salicylic acid and methylene blue depending upon their crystallinity and porous structure.

Porous Titania Nanosheet/Nanoparticle Hybrids as Photoanodes for Dye-Sensitized Solar Cells

“…Layered nanohybrids (NHs) by pillaring semiconducting nanoparticles such as CdS, α-Fe2O3, and TiO2 [21][22][23][24] into layered inorganic compounds [25][26][27][28][29][30] have recently drawn growing attention in photocatalysis, due to their large surface area as well as suppressed electronhole recombination because of electron transfer between guest and host. 22,23,31 Titanate nanosheets (Ti0.91O2) derived from delamination of layered compounds have unique structural characteristic of ultimate two-dimensional anisotropy with extremely small thickness in the subnano-to nanometer scales, which leads to new physical and chemical properties for nanosheets.…”

“…Layered nanohybrids (NHs) from pillaring of semiconducting NPs such as CdS, α-Fe 2 O 3 , and TiO 2 − into layered inorganic compounds − have recently drawn growing attention in photocatalysis as a result of their large surface area as well as suppressed electron–hole recombination because of electron transfer between the guest and host. ,, Titania NSs (Ti 0.91 O 2 ) derived from delamination of layered compounds have unique structural characteristics of ultimate 2D anisotropy with extremely small thickness in the subnano- to nanometer scales, which leads to new physical and chemical properties for NSs . In addition, the exfoliation of layered metal oxides into 2D NSs , (Ti 0.91 O 2 NSs) makes it possible to pillar large-sized (TiO 2 ) NPs into the interlayer space of host materials through an exfoliation–restacking process of nanosheets and guest particles. ,, The obtained pillared NHs possess highly controllable physical and chemical properties. ,− In particular, because of the enlarged interlayer distance, the total surface area is significantly increased, facilitating chemical adsorption or reaction.…”

Structure, Properties, Preparation, and Application of Layered Titanates

“…Subsequent research has successfully introduced semiconductor nanoparticles, such as TiO 2 , CdS, ZnO, Fe 2 O 3 , SnO 2 , and Cu 2 O, into layered titanate. The photocatalytic activity of this composite material is higher than that of the corresponding layered titanate.…”

Porous SnO2/layered titanate nanohybrid with enhanced electrochemical performance for reversible lithium storage

“…Recently, Ko et al reported SnO 2 -pillared titanate with ordered structure, whereas we propose SnO 2 /titanate with delaminated porous structure. 8 To the best of our knowledge, this is the first example of a porous SnO 2 /layered titanate nanohybrid being applied as anode material with high electrochemical performance.…”

“…Titanate nanosheets were prepared by exfoliation of protonated layered titanate, H 0.67 Ti 1.83 & 0.17 O 4 ÁH 2 O, 9 while tin oxide nanoparticles were obtained by the hydrolysis of SnCl 4 with NaOH. 7,8 And then, the hydrosol was reacted with the aqueous suspension of exfoliated layered titanate (the molar ratio of Sn to Ti was fixed to 1.5). The as-prepared sample (hereafter abbreviated as as-prepared STN) was heated at 250 1C and 400 1C for 2 h under an Ar atmosphere, respectively (hereafter abbreviated as STN-I and STN-II, respectively).…”